Regent International, the largest apartment building in the world, houses over 20,000 people with everything under one roof.

It's been a year since Oklahoma City's Legends Tower was first announced. Here we outline the key facts about the supertall skyscraper that is vying to be the tallest building in the United States.

It was the tallest building in the world for 40 years. This video shows the size of the building and other interesting facts ...

The tower also has several amenities, including a gym, swimming pool, and cinema. Based on its sheer size alone, the tower ...